PCX7457VGH1000NC Atmel, PCX7457VGH1000NC Datasheet - Page 47

• Manufacturer Part Number: PCX7457VGH1000NC
• Description: IC MPU 32BIT 1000MHZ 483CBGA
• Manufacturer: Atmel

Specifications of PCX7457VGH1000NC

• Processor Type: PowerPC 32-Bit RISC
• Speed: 1.0GHz
• Voltage: 1.1V
• Mounting Type: Surface Mount
• Package / Case: 483-CBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

15. System Design Information
15.1
15.1.1
Table 15-1.
5345D–HIREL–07/06
PLL_CFG[0:4]
01000
10000
10100
10110
10010
11010
01010
00100
00010
11000
01100
01111
01110
Clocks
Core Clocks and PLL Configuration
PC7457 Microprocessor PLL Configuration Example for 1267 MHz Parts
Bus-to-Core
Multiplier
5.5x
6.5x
7.5x
8.5x
9.5x
2x
3x
4x
5x
6x
7x
8x
9x
This section provides system and thermal design recommendations for successful application of
the PC7457.
The following sections provide more detailed information regarding the clocking o fthe PC7457.
The PC7457 PLL is configured by the PLL_CFG[0:4] signals. For a given SYSCLK (bus) fre-
quency, the PLL configuration signals set the internal CPU and VCO frequency of operation.
The PLL configuration for the PC7457 is shown in
In this example, shaded cells represent settings that, for a given SYSCLK frequency, result in
core and/or VCO frequencies that do not comply with the 1-GHz column in
20. Note that these configurations were different in some earlier PC7450-family devices and
care should be taken when upgrading to the PC7457 to verify the correct PLL settings for an
application.
Core-to-VCO
Multiplier
2x
2x
2x
2x
2x
2x
2x
2x
2x
2x
2x
2x
2x
MHz
33.3
Example Bus-to-Core Frequency in MHz (VCO Frequency in MHz)
MHz
50
(1200)
(1266)
66.6
MHz
600
633
Bus (SYSCLK) Frequency
(1200)
(1276)
(1350)
(1524)
Table 15-1
MHz
600
638
675
712
75
(1245)
(1328)
(1412)
(1494)
(1578)
MHz
623
664
706
747
789
83
for a set of example frequencies.
(1200)
(1300)
(1400)
(1500)
(1600)
(1700)
(1800)
(1900)
MHz
100
600
650
700
750
800
850
900
950
Table 7-2 on page
(1333)
(1466)
(1600)
(1730)
(1862)
(2000)
(2128)
(2261)
(2394)
(2528)
1000
1064
1131
1197
1264
MHz
133
667
733
800
866
931
PC7457
(1333)
(1670)
(1837)
(2004)
(2171)
(2338)
(2505)
1002
1086
1169
1253
MHz
167
667
835
919
47